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' UNiTED STATES PATENT OFFICE.

THOMAS J. BOYER, or 'DUBOIS, PENNSYLVANIA, ASSIGNOR OF THREE- FOURTHS TO GEO. D. HAMOR, EMANUEL KUNTZ, AND ALLISON M. BOSOOE,

ALL or sham PLACE.)

INSECTICIDEI.

SPECIFICATION forming part of Letters P atentNo. 351,897, dated November 2, 1886.

Application filed July 1, 1886. Serial No. 206,840. (No specimens.)

To all whom it may concern.- Beitknown that I, THOMAS J. BoYER, a cilizen of the United States, residing at Dubois, in the county of Olearfield and State of Pennsylvania, have invented certain new and useful Improvements in Insecticides; and I do.

declare the following to be a full, clear, and exact description'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to insecticides for protecting vegetation and plants from vermin.

The invention consists in the compound and paper, felt, or suitable fabric and porous substance impregnated therewith in the manner to ,be described.

The vital point of the invention consists in the manner of preparation of the paper and the compound Wit-h which it is impregnated, which consists of coal or gas tar, thirty-five parts; crude petroleum, five parts; oil of cedar, ten parts; oil, of pennyroyal, five parts; oil of sassafras, five parts, oil of citronella, five parts; creosote, fiveparts; carbolic acid, twenty-five parts, and sulphur, five parts.

The above ingredients are mixed thoroughly in about the proportions stated, which may be varied according to the locality and num ber of vermin to be repelled or exterminated. One species of vermin may abound in one place, and in another locality the same species may berare; hence the advantage of varying the proportions to correspond with the predominance of any one species. The proportions best adapted for any particular locality, having been once ascertained by experiment 7 and research, remainfixed.

The above mixture or compound is introduced into the vat containing the pulp just previous to the making of the paper or felt, which is made in the usual manner; 'or the paper, felt, wood, and kindred porous substance may be impregnated in any desired manner, either by immersion or having the same brushed thereover. The introduction of the compound into the paper at the time of manufacture is preferred, as it is more ihtimately and thoroughly mixed, and the repelling properties of the paper will be more lasting, and it (the paper) will give the best re sults.

Having thus described my invention, 'what I'claim, and desire to secure by Letters Patcut, is v 1. The herein-described insecticide, consisting of coal or gas tar, crude petroleum, oil of cedar, oil of pennyroyal, oil of Sassafras, oil of citronella, creosote, carbolic acid, and sulphur, in about the proportions specified.

2. The herein-described insecticide, consisting of a porous substance impregnated with the compound composed of coal or gas tar,

crude petroleum, oil of cedar, oil-of penny royal, oilof sassafras, oil of citronella, creosote, carbolic acid, and sulphur, in about the proportions set forth.

In testimony whereof I THOMAS J. BOYER.

affix my signature in presence of two witnesses. 

